1. Consider three processors P1, P2, and P3 executing a program consisting of 2 109 instructions. The specifications of these three processors are listed as follows Processor Frequency (GHz) CPI 2 3 P1 P2 P3 2 4 (a) How many seconds does each processor need to take to execute this program? (b) For each processor, we are trying to reduce the execution time by 20%, but this leads to an increase of 25% in the CPI. What are the new clock rates for these three processors